Finding the Fourth Proportional to 66,630.69, 91,976.28 and 45,109.91

Step by Step Solution

1. Step 1: Write the proportion equation
   66,630.69 : 91,976.28 = 45,109.91 : x
2. Step 2: Convert to fraction form
   66,630.69/91,976.28 = 45,109.91/x
3. Step 3: Cross multiply
   66,630.69x = 91,976.28 × 45,109.91
4. Step 4: Simplify right side
   66,630.69x = 4,149,041,773.71
5. Step 5: Solve for x
   x = 4,149,041,773.71/66,630.69
6. Step 6: Final answer
   x = 62,269.23